Add reasoning agent

Update version to v1.5.0

src/main/kotlin/tools/ReasoningAgent.kt

@@ -0,0 +1,58 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.ChatCompletionRequest
+import com.aallam.openai.api.chat.ChatMessage
+import com.aallam.openai.api.chat.Tool
+import com.aallam.openai.api.core.Parameters
+import com.aallam.openai.api.model.ModelId
+import com.aallam.openai.client.Chat
+import kotlinx.serialization.json.*
+import top.jie65535.mirai.PluginConfig
+
+class ReasoningAgent : BaseAgent(
+    tool = Tool.function(
+        name = "reasoning",
+        description = "可通过调用推理模型对问题进行深度思考。",
+        parameters = Parameters.buildJsonObject {
+            put("type", "object")
+            putJsonObject("properties") {
+                putJsonObject("prompt") {
+                    put("type", "string")
+                    put("description", "用于调用推理模型的提示")
+                }
+            }
+            putJsonArray("required") {
+                add("question")
+            }
+        },
+    )
+) {
+    var llm: Chat? = null
+
+    override val loadingMessage: String
+        get() = "深度思考中..."
+
+    override val isEnabled: Boolean
+        get() = llm != null
+
+    override suspend fun execute(args: JsonObject?): String {
+        requireNotNull(args)
+        val llm = llm ?: return "未配置llm，无法进行推理。"
+
+        val prompt = args.getValue("prompt").jsonPrimitive.content
+        val answerContent = StringBuilder()
+        llm.chatCompletions(ChatCompletionRequest(
+            model = ModelId(PluginConfig.reasoningModel),
+            messages = listOf(ChatMessage.Companion.User(prompt))
+        )).collect {
+            if (it.choices.isNotEmpty()) {
+                val delta = it.choices[0].delta ?: return@collect
+                if (!delta.content.isNullOrEmpty()) {
+                    answerContent.append(delta.content)
+                }
+            }
+        }
+
+        return answerContent.toString().ifEmpty { "推理出错，结果为空" }
+    }
+}